mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 05:51:04 +00:00
121 lines
4.2 KiB
C++
121 lines
4.2 KiB
C++
/* signal_node.h -*-C++-*-
|
|
*
|
|
*************************************************************************
|
|
*
|
|
* Copyright (C) 2009-2016, Intel Corporation
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
|
|
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* *********************************************************************
|
|
*
|
|
* PLEASE NOTE: This file is a downstream copy of a file mainitained in
|
|
* a repository at cilkplus.org. Changes made to this file that are not
|
|
* submitted through the contribution process detailed at
|
|
* http://www.cilkplus.org/submit-cilk-contribution will be lost the next
|
|
* time that a new version is released. Changes only submitted to the
|
|
* GNU compiler collection or posted to the git repository at
|
|
* https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git are
|
|
* not tracked.
|
|
*
|
|
* We welcome your contributions to this open source project. Thank you
|
|
* for your assistance in helping us improve Cilk Plus.
|
|
**************************************************************************/
|
|
|
|
/**
|
|
* @file signal_node.h
|
|
*
|
|
* @brief Signal nodes allow coordinated waking and sleeping of the runtime
|
|
* without hammering on a single location in memory.
|
|
*
|
|
* The workers are logically arranged in a binary tree and propagate messages
|
|
* leaf-ward. User workers notify the root about waking and sleeping, so only
|
|
* that one node need share a cache line with a user worker.
|
|
*/
|
|
|
|
#ifndef INCLUDED_SIGNAL_NODE_DOT_H
|
|
#define INCLUDED_SIGNAL_NODE_DOT_H
|
|
|
|
#include "rts-common.h"
|
|
#include <cilk/common.h>
|
|
|
|
__CILKRTS_BEGIN_EXTERN_C
|
|
|
|
/** Opaque type. */
|
|
typedef struct signal_node_t signal_node_t;
|
|
|
|
/**
|
|
* Allocate and initialize a signal_node_t
|
|
*
|
|
* @return The initialized signal_node_t
|
|
*/
|
|
COMMON_SYSDEP
|
|
signal_node_t *signal_node_create(void);
|
|
|
|
/**
|
|
* Free any resources and deallocate a signal_node_t
|
|
*
|
|
* @param node The node to be deallocated.
|
|
*/
|
|
COMMON_SYSDEP void signal_node_destroy(signal_node_t *node);
|
|
|
|
/**
|
|
* Test whether the node thinks the worker should go to sleep
|
|
*
|
|
* @param node The node to be tested.
|
|
*
|
|
* @return 1 If the worker should go to sleep
|
|
* @return 0 If the worker should not go to sleep
|
|
*/
|
|
COMMON_SYSDEP
|
|
unsigned int signal_node_should_wait(signal_node_t *node);
|
|
|
|
/**
|
|
* Specify whether the worker should go to sleep
|
|
*
|
|
* @param node The node to be set.
|
|
* @param msg The value to be set. Valid values are:
|
|
* - 0 - the worker should go to sleep
|
|
* - 1 - the worker should stay active
|
|
*/
|
|
COMMON_SYSDEP
|
|
void signal_node_msg(signal_node_t *node, unsigned int msg);
|
|
|
|
|
|
/**
|
|
* Wait for the node to be set
|
|
*
|
|
* @param node The node to wait on
|
|
*/
|
|
COMMON_SYSDEP
|
|
void signal_node_wait(signal_node_t *node);
|
|
|
|
__CILKRTS_END_EXTERN_C
|
|
|
|
#endif // ! defined(INCLUDED_SIGNAL_NODE_DOT_H)
|